---
title: "List Critical Surfaces"
method: GET
path: "/api/v1/parts/{part_id}/critical-surfaces"
tags: ["part_annotations"]
---

# List Critical Surfaces

`GET /api/v1/parts/{part_id}/critical-surfaces`

List faces marked as critical for a part.

## Path parameters

- `part_id` string, uuid, required

## Response `200`

Successful Response

- CriticalSurfaceRead[]
  - `id` string, uuid, required
  - `part_id` string, uuid, required
  - `cad_file_version_id` string, uuid, nullable, required
  - `face_id` string, required
  - `is_critical` boolean, required
  - `state` string, required
  - `created_at` string, date-time, required
  - `updated_at` string, date-time, nullable, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/prototyping/apis/prototyping-io-api.md) · [All operations](https://skmtc.dev/prototyping/apis/prototyping-io-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/prototyping/prototyping-io-api/revisions/f4a0079fbb57/schema)